Volvo Penta 31 Series Workshop Manual page 91

67
Circulation pump belt (Poly-Vee belt)
6
The check point for the belt is at (5), mid way between
the pulleys. Adjust with belt tensioner (6). Wrench
size: 8 mm socket cap (2x).
NOTE! Turn the belt tensioner anti-clockwise.
The following applies to installing a new belt.
– Tension the belt to 65–70 kg (132–154.3 lb) .
– Turn the engine round about one turn in its direc-
tion of rotation.
– Check that the belt tension is still about 65–70 kg
(132–154.3 lb) (adjust as necessary).
– Warm the engine up at a speed of 1500 rpm for 5
minutes
– Re-check that the belt tension is still about 65–70
kg (132–154.3 lb)and adjust as necessary.
The following applies to installing a used belt.
– Tension the belt to 40–45 kg (88–99.2 lb).
– Turn the engine round about one turn in its direc-
tion of rotation.
– Check that the belt tension is still about 40–45 kg
(88–99.2 lb) (adjust as necessary).
68
Alternator belt
Tension the belts with adjuster screw (3). The check
point on the belt is at (3), right behind the edge of the
poly-Vee pulley track. Tighten screws (1) and (2).
Belt tension 20–25 kg (44–55.1 lb).
69
Compressor belt (not 42WJ)
The check point on the belt is right above the engine
housing stud (1). Adjust the belt tension with belt ten-
sioner (2). Turn the jockey pulley clockwise so that it
tensions the belt, then tighten the socket cap screws.
Wrench size 8 mm socket cap (2x).
The following applies to installing a new belt.
– Tension the belt to 40–45 kg (88–99.2 lb).
– Turn the engine round about one turn in its direc-
tion of rotation.
– Check that the belt tension is still about 40–45 kg
(88–99.2 lb) (adjust as necessary).
– Warm the engine up at a speed of 1500 rpm for 5
minutes
– Re-check that the belt tension is still about 40–45
kg (88–99.2 lb) and adjust as necessary.
Repair Instructions
89